I have been using routers for a long time, and I guess you can say I don't know anything about the speed changes. When should you use high speed and low speed or in between? I have been using nothing but high speed the whole time, then one day, I think in this forum. I saw someone mention you should use 10,000 on dovetails, is this true? I do own a book on routers, but do you think I can find it. Should soft wood be slower than hard wood? Could be why sometimes when I do raised panels I get a little bit of burn marks, and I thought it was just a dull bit.